Liquid hydrogen pressurization gasification type liquid hydrogen hydrogenation station and operation control method

Abstract

The present application relates to a kind of liquid hydrogen pressurization gasification type liquid hydrogen hydrogen station and operation control method.The liquid hydrogen hydrogen station includes liquid hydrogen source, liquid hydrogen booster set, liquid hydrogen gasifier set, high-pressure hydrogen storage bottle set, blending temperature tank, hydrogen dispenser set and central processing unit.The operation control method is that the liquid hydrogen of liquid hydrogen booster set output is passed into high-pressure hydrogen storage bottle set for storage after being gasified by liquid hydrogen gasifier, and high-pressure normal-temperature gas hydrogen is output, and high-pressure low-temperature liquid hydrogen output by liquid hydrogen booster is mixed in blending temperature tank, then is filled after being constant temperature to specified temperature by hydrogen dispenser.Compared with prior art, the present application can adjust the connection mode of liquid hydrogen booster, high-pressure hydrogen storage bottle set and liquid hydrogen gasifier, blending temperature tank according to different fuel cell vehicle hydrogenation scene and demand, stepwisely adjust the pressure of liquid hydrogen output by two liquid hydrogen boosters, realize the large-flow pressure grading continuous filling of fuel cell vehicle, which is helpful to the promotion and application of liquid hydrogen hydrogen station.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy and fuel cell vehicle technology, and in particular to a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station and its operation control method. Background Technology

[0002] Vigorously developing hydrogen energy is one of the important measures to achieve energy structure transformation and sustainable development. Hydrogen refueling stations are key infrastructure for energy replenishment of hydrogen energy utilization equipment such as hydrogen fuel cells, and are an important prerequisite for the promotion and application of fuel cell vehicles and the accelerated development of the hydrogen energy industry.

[0003] Depending on the hydrogen storage method used, hydrogen refueling stations are divided into high-pressure hydrogen (gaseous hydrogen) refueling stations and liquid hydrogen refueling stations. Among them, liquid hydrogen refueling stations use liquid hydrogen as the storage method for hydrogen energy within the station, which has the advantages of high storage and transportation efficiency and high energy density, and represents the future development trend of low-energy-consumption, large-scale hydrogen refueling stations.

[0004] Large-capacity hydrogen storage, high-flow-rate, low-energy-consumption 70MPa high-pressure refueling are the development direction of liquid hydrogen refueling stations. To achieve a boosting capacity of up to 90MPa, existing liquid hydrogen booster pumps mostly adopt a reciprocating structure, with two main drive methods: electric motor drive and hydraulic drive. Hydraulic drive is a transmission method that uses liquid as a transmission medium to transmit power and motion. Its working principle is based on Pascal's law, which states that in a sealed container, the pressure of a liquid is equal in all directions. Utilizing this principle, hydraulic drive can transmit the force generated by the liquid under high pressure to a low-pressure area, thereby realizing the transmission of power and control of motion. Furthermore, this power itself has the characteristics of low speed and high torque, giving hydraulically driven reciprocating liquid hydrogen booster pumps the advantages of large output flow and high energy efficiency, making it the development trend for high-flow-rate liquid hydrogen booster pumps in liquid hydrogen refueling stations.

[0005] Employing gas / liquid hydrogen blending technology can significantly reduce the energy consumption required for pre-cooling before high-pressure hydrogen refueling. Therefore, high-pressure hydrogen storage cylinder groups are also necessary at liquid hydrogen refueling stations. To improve the utilization rate of high-pressure hydrogen storage cylinder groups, reduce the footprint, and lower costs, refueling stations typically adopt a tiered refueling mode for high-pressure hydrogen storage cylinder groups. That is, when refueling a 70MPa fuel cell vehicle, a 45MPa hydrogen storage cylinder is used first, followed by a 90MPa hydrogen storage cylinder; for hydrogen storage cylinders of the same pressure level, the lower-pressure high-pressure storage cylinder is used first, followed by the higher-pressure high-pressure storage cylinder. However, hydraulically driven liquid hydrogen booster pumps have a slow response speed to changes in output pressure. When refueling a fuel cell vehicle, when switching from a lower-pressure high-pressure storage cylinder to a higher-pressure high-pressure storage cylinder, the output pressure of the liquid hydrogen booster pump cannot rise to the pressure of the hydrogen in the higher-pressure storage cylinder in real time, which seriously affects its flow output and gas / liquid hydrogen blending effect.

[0006] To address the aforementioned needs and problems, there is an urgent need to propose a pressurized vaporization type liquid hydrogen refueling station and an operation control method for alternating pressurization of multiple liquid hydrogen booster pumps, so as to achieve high-flow-rate, pressure-staged, continuous refueling of fuel cell vehicles, which will help promote and apply liquid hydrogen refueling stations. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology by providing a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station and its operation control method. By enabling staged refueling of fuel cell vehicles at the liquid hydrogen refueling station, the utilization rate of high-pressure hydrogen storage cylinders is significantly improved, the number of high-pressure hydrogen storage cylinders is effectively reduced, thereby reducing the footprint of the liquid hydrogen refueling station, thus reducing costs and saving land.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] This invention provides a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station, including a liquid hydrogen source, a liquid hydrogen pressurization pump group, a liquid hydrogen vaporizer group, a high-pressure hydrogen storage cylinder group, a blending and temperature mixing tank, a hydrogen refueling unit, and a central processing unit.

[0010] The outlet pipe of the liquid hydrogen source is connected to a liquid hydrogen booster pump set, and the outlet pipe of the liquid hydrogen booster pump set is connected to a mixing and temperature adjustment tank.

[0011] Alternatively, the outlet pipe of the liquid hydrogen booster pump unit is connected to the liquid hydrogen vaporizer unit;

[0012] The outlet pipe of the liquid hydrogen vaporizer group is connected to the high-pressure hydrogen storage cylinder group, the outlet pipe of the high-pressure hydrogen storage cylinder group is connected to the mixing and temperature mixing tank, and the outlet pipe of the mixing and temperature mixing tank is connected to the hydrogen refueling unit.

[0013] The liquid hydrogen booster pump unit is communicatively connected to the central processing unit, which is used for the operation control of the liquid hydrogen booster gasification type liquid hydrogen refueling station.

[0014] Furthermore, the liquid hydrogen booster pump assembly includes at least two liquid hydrogen booster pumps connected in parallel;

[0015] The high-pressure hydrogen storage cylinder group includes multiple hydrogen storage cylinder groups arranged in parallel with different pressure levels or a single pressure hydrogen storage cylinder group.

[0016] Furthermore, the outlet pipe of the liquid hydrogen booster pump is equipped with a safety relief valve, a temperature sensor, a pressure sensor, and a flow meter, all of which are communicatively connected to the central processing unit.

[0017] Furthermore, each of the high-pressure hydrogen storage cylinder groups is equipped with an inlet hydrogen control valve on its inlet pipe and an outlet hydrogen control valve on its outlet pipe. Both the inlet and outlet hydrogen control valves are connected in communication with the central processing unit.

[0018] This invention also provides an operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station, the method comprising:

[0019] First hydrogen refueling mode: When the 45MPa high-pressure hydrogen storage tank group can complete the entire hydrogen refueling process for the 35MPa fuel cell vehicle, the 45MPa high-pressure hydrogen storage tank group is used to refuel the 35MPa fuel cell vehicle.

[0020] Second hydrogen refueling mode: When the 45MPa high-pressure hydrogen storage tank group and the 90MPa high-pressure hydrogen storage tank group can complete the entire hydrogen refueling process for the 70MPa fuel cell vehicle, the 45MPa and 90MPa high-pressure hydrogen storage tank groups are used to refuel the 35MPa fuel cell vehicle.

[0021] The third hydrogen refueling mode: When the 45MPa high-pressure hydrogen storage tank group alone cannot complete the entire hydrogen refueling process for the 70MPa fuel cell vehicle, the gaseous hydrogen output from the 45MPa high-pressure hydrogen storage tank group is mixed with the liquid hydrogen output from the liquid hydrogen booster pump group before refueling the 70MPa fuel cell vehicle.

[0022] Fourth hydrogen refueling mode: When the 45MPa and 90MPa high-pressure hydrogen storage tank sets cannot complete the entire hydrogen refueling process for the 70MPa fuel cell vehicle, the gaseous hydrogen output from the 45MPa and 90MPa high-pressure hydrogen storage tank sets is mixed with the liquid hydrogen output from the liquid hydrogen booster pump set in sequence to refuel the 70MPa fuel cell vehicle.

[0023] Hydrogen replenishment mode: When the liquid hydrogen refueling station does not need to refuel the fuel cell vehicle, there are high-pressure hydrogen storage cylinders in the high-pressure hydrogen storage cylinder group that have not reached the rated pressure. The liquid hydrogen booster pump group is used to fill the high-pressure hydrogen storage cylinder group with gas and replenish hydrogen.

[0024] Furthermore, the specific process of the first hydrogenation mode is as follows:

[0025] When a liquid hydrogen refueling station refuels a 35MPa fuel cell vehicle, and the entire refueling process can be completed solely by the station's 45MPa high-pressure hydrogen storage tank assembly, the liquid hydrogen booster pump assembly does not operate. The 45MPa hydrogen storage tank assembly in the high-pressure hydrogen storage tank assembly outputs room-temperature hydrogen gas, which is then constant to the specified temperature through the heat exchange system of the hydrogen refueling unit before being injected into the 35MPa fuel cell vehicle.

[0026] Furthermore, the specific process of the second hydrogenation mode is as follows:

[0027] When a liquid hydrogen refueling station refuels a 70MPa fuel cell vehicle, and the entire refueling process can be completed using only the 45MPa and 90MPa high-pressure hydrogen storage tanks within the station, the liquid hydrogen booster pump does not operate. Instead, the 45MPa and 90MPa hydrogen storage tanks in the high-pressure hydrogen storage tanks sequentially output room-temperature hydrogen, which is then constant to the designated temperature through the heat exchange system of the refueling unit before being injected into the 70MPa fuel cell vehicle.

[0028] Furthermore, the specific process of the third hydrogenation mode is as follows:

[0029] When a liquid hydrogen refueling station refuels a 35MPa fuel cell vehicle, and the station's 45MPa high-pressure hydrogen storage tank assembly alone cannot complete the entire refueling process, the refueling process includes the following steps:

[0030] S1: Start the liquid hydrogen booster pump group, adjust the liquid hydrogen control valve and the gas hydrogen control valve so that the two liquid hydrogen booster pumps simultaneously fill the first 45MPa hydrogen storage cylinder group with lower pressure through the vaporizer.

[0031] S2: When the output pressure of the liquid hydrogen booster pump group is consistent with the hydrogen pressure in the 45MPa hydrogen storage cylinder in S1, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve so that the liquid hydrogen output by the first liquid hydrogen booster pump and the gaseous hydrogen output by the 45MPa first hydrogen storage cylinder group are mixed in the mixing and temperature matching tank, and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0032] S3: When the flow rate of gaseous hydrogen output from the 45MPa first hydrogen storage tank group in S2 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump and the gaseous hydrogen output from the 45MPa second hydrogen storage tank group are mixed in the mixing and temperature matching tank and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0033] S4: When the gaseous hydrogen flow rate output from the 45MPa second hydrogen storage tank group in S3 is less than the set value of 0~0.5kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the liquid hydrogen booster pump group is vaporized by the liquid hydrogen vaporizer group and flows with the gaseous hydrogen output from the 45MPa second hydrogen storage tank group through the mixing and temperature matching tank, and is charged into the fuel cell vehicle through the hydrogen refueling unit until the pressure of the fuel cell vehicle reaches 35MPa and then stops.

[0034] Furthermore, the specific process of the fourth hydrogenation mode is as follows:

[0035] Fourth hydrogen refueling mode: When a liquid hydrogen refueling station refuels a 70MPa fuel cell vehicle, and the station's 45MPa and 90MPa high-pressure hydrogen storage tanks alone cannot complete the entire refueling process, the refueling process includes the following steps:

[0036] S1: Start the liquid hydrogen booster pump group 2, adjust the liquid hydrogen control valve and the gas hydrogen control valve, and the two liquid hydrogen booster pumps simultaneously fill the first 45MPa hydrogen storage cylinder group with lower pressure through the vaporizer.

[0037] S2: When the output pressure of the liquid hydrogen booster pump group 2 is consistent with the hydrogen pressure in the 45MPa first hydrogen storage tank group in S1, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve so that the liquid hydrogen output by the first liquid hydrogen booster pump and the gaseous hydrogen output by the 45MPa first hydrogen storage tank group are mixed in the mixing and temperature matching tank, and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0038] S3: When the flow rate of gaseous hydrogen output from the first hydrogen storage tank at 45MPa in S2 is less than the set value of 0.3 ~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump and the gaseous hydrogen output from the second hydrogen storage tank at 45MPa are mixed in the mixing and temperature matching tank and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0039] S4: When the flow rate of gaseous hydrogen output from the 45MPa second hydrogen storage tank group in S3 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the first liquid hydrogen booster pump and the gaseous hydrogen output from the 90MPa third hydrogen storage tank group are mixed in the mixing and temperature matching tank and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0040] S5: When the gaseous hydrogen flow rate output from the 90MPa third hydrogen storage tank group in S4 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump and the gaseous hydrogen output from the 90MPa fourth hydrogen storage tank group are mixed in the mixing and temperature matching tank and then charged into the fuel cell vehicle through the hydrogen refueling unit.

[0041] S6: When the gaseous hydrogen flow rate output from the 90MPa fourth hydrogen storage tank group in S5 is less than the set value of 0~0.5kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the liquid hydrogen booster pump group is vaporized by the liquid hydrogen vaporizer group and flows with the gaseous hydrogen output from the 90MPa fourth hydrogen storage tank group through the mixing and temperature matching tank. It is then charged into the fuel cell vehicle through the hydrogen refueling unit until the pressure of the fuel cell vehicle reaches 70MPa and then stops.

[0042] Furthermore, the specific process of the hydrogen replenishment mode is as follows:

[0043] When a liquid hydrogen refueling station does not need to refuel fuel cell vehicles, and there are high-pressure hydrogen storage cylinders in the high-pressure hydrogen storage cylinder group that have not reached the rated pressure, the liquid hydrogen control valve is adjusted to allow the liquid hydrogen booster pump group to fill the high-pressure hydrogen storage cylinder group. The filling is carried out in descending order of pressure level, and each high-pressure hydrogen storage cylinder group is filled before the next high-pressure hydrogen storage cylinder group is filled. When all high-pressure hydrogen storage cylinder groups have reached the rated pressure, the liquid hydrogen booster pump group stops working.

[0044] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0045] 1. This invention adjusts the connection method of the liquid hydrogen booster pump, high-pressure hydrogen storage tank group, liquid hydrogen vaporizer, and mixing and temperature mixing tank by opening or closing the liquid hydrogen control valve on the liquid hydrogen booster pump outlet pipe and the gaseous hydrogen control valve on the inlet and outlet pipes of the high-pressure hydrogen storage tank group. It can adjust the pressure of liquid hydrogen output by multiple liquid hydrogen booster pumps in a stepwise manner, so as to realize the continuous refueling of fuel cell vehicles with high flow rate and pressure stages. It is particularly suitable for liquid hydrogen refueling stations using hydraulically driven liquid hydrogen booster pumps.

[0046] 2. This invention enables staged refueling of fuel cell vehicles at liquid hydrogen refueling stations, which can significantly improve the utilization rate of high-pressure hydrogen storage cylinders, effectively reduce the number of high-pressure hydrogen storage cylinders, thereby reducing the footprint of liquid hydrogen refueling stations, reducing costs, saving land use, and contributing to the promotion and application of liquid hydrogen refueling stations. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a liquid hydrogen refueling station with pressurized vaporization.

[0048] Figure 1 Explanation of the markings in the text:

[0049] 1-Liquid hydrogen source, 2-Liquid hydrogen booster pump group, 21-First liquid hydrogen booster pump, 22-Second liquid hydrogen booster pump, 3-Liquid hydrogen vaporizer group, 31-First liquid hydrogen vaporizer, 32-Second liquid hydrogen vaporizer, 4-High-pressure hydrogen storage cylinder group, 41-45MPa first hydrogen storage cylinder group, 42-45MPa second hydrogen storage cylinder group, 43-90MPa third hydrogen storage cylinder group, 44-90MPa fourth hydrogen storage cylinder group, 5-Blending and temperature mixing tank, 6-Hydrogen refueling unit, 61-First Hydrogen dispenser, 62-Second hydrogen dispenser, 211-First liquid hydrogen control valve, 212-Second liquid hydrogen control valve, 221-Third liquid hydrogen control valve, 222-Fourth liquid hydrogen control valve, 411-First gaseous hydrogen control valve, 412-Second gaseous hydrogen control valve, 421-Third gaseous hydrogen control valve, 422-Fourth gaseous hydrogen control valve, 431-Fifth gaseous hydrogen control valve, 432-Sixth gaseous hydrogen control valve, 441-Seventh gaseous hydrogen control valve, 442-Eighth gaseous hydrogen control valve. Detailed Implementation

[0050] The following examples illustrate specific implementations of the present invention. These examples are carried out based on the solution described in the present invention, and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following examples.

[0051] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Any component models, material names, connection structures, manufacturing methods, materials, structures, or composition ratios not explicitly stated in this technical solution are considered common technical features disclosed in the prior art.

[0052] Example 1

[0053] This embodiment provides a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station, such as... Figure 1 As shown, it includes a liquid hydrogen source 1, a liquid hydrogen booster pump group 2, a liquid hydrogen vaporizer group 3, a high-pressure hydrogen storage cylinder group 4, a blending and temperature mixing tank 5, a hydrogen refueling unit 6, and a central processing unit.

[0054] The outlet pipe of liquid hydrogen source 1 is connected to liquid hydrogen booster pump group 2, and the outlet pipe of liquid hydrogen booster pump group 2 is connected to blending and temperature mixing tank 5; or, the outlet pipe of liquid hydrogen booster pump group 2 is connected to liquid hydrogen vaporizer group 3. The outlet pipe of liquid hydrogen vaporizer group 3 is connected to high-pressure hydrogen storage cylinder group 4, and the outlet pipe of high-pressure hydrogen storage cylinder group 4 is connected to blending and temperature mixing tank 5. The outlet pipe of blending and temperature mixing tank 5 is connected to hydrogen refueling unit 6.

[0055] The liquid hydrogen booster pump assembly is communicatively connected to a central processing unit (CPU), which is used for the operation control of the liquid hydrogen booster vaporization type liquid hydrogen refueling station. The liquid hydrogen booster pump assembly 2 includes at least two liquid hydrogen booster pumps connected in parallel. The outlet pipes of the liquid hydrogen booster pumps are equipped with a safety relief valve, a temperature sensor, a pressure sensor, and a flow meter.

[0056] The high-pressure hydrogen storage cylinder group 4 comprises multiple parallel hydrogen storage cylinder groups with different pressure levels or a single pressure hydrogen storage cylinder group. Each high-pressure hydrogen storage cylinder group 4 is equipped with an inlet hydrogen control valve on its inlet pipe and an outlet hydrogen control valve on its outlet pipe. Both the inlet and outlet hydrogen control valves are communicatively connected to the central processing unit. In actual operation, the inlet and outlet pipes of the high-pressure hydrogen storage cylinder group can also be the same pipe.

[0057] This embodiment also provides an operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station. When the liquid hydrogen refueling station needs to refuel a 35MPa fuel cell vehicle, and both the 45MPa first hydrogen storage cylinder group 41 and the 45MPa second hydrogen storage cylinder group 42 in the station are full, the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 do not work, and the refueling is completed solely by the 45MPa first hydrogen storage cylinder group 41 in the station. The first liquid hydrogen control valve 211, the second liquid hydrogen control valve 212, the third liquid hydrogen control valve 221, the fourth liquid hydrogen control valve 222, the first gaseous hydrogen control valve 411, the third gaseous hydrogen control valve 421, the fourth gaseous hydrogen control valve 422, the fifth gaseous hydrogen control valve 431, the sixth gaseous hydrogen control valve 432, the seventh gaseous hydrogen control valve 441, and the eighth gaseous hydrogen control valve 442 are closed. The second gaseous hydrogen control valve 412 is opened. The 45MPa first hydrogen storage cylinder group 41 outputs room temperature hydrogen, which is kept constant at 0°C by the heat exchange system in the first hydrogen refueling machine 61 and then filled into the 35MPa fuel cell vehicle.

[0058] Assuming a room temperature of 20°C, the residual gas pressure of the 35MPa fuel cell vehicle to be refueled is 10MPa. According to the SAE-J2601 refueling protocol, the average pressure rise rate under these conditions should be 4.3MPa / min. The refueling time t is:

[0059]

[0060] APRR (Average Pressure Ramp Rate) is the average pressure increase rate.

[0061] According to the above formula, when both the 45MPa first hydrogen storage cylinder group 41 and the 45MPa second hydrogen storage cylinder group 42 in the high-pressure hydrogen storage cylinder group 4 in the station are full, the time to refuel a 35MPa fuel cell vehicle with an initial pressure of 5MPa is 5.81 minutes, and the refueling process only consumes the high-pressure hydrogen in the 45MPa first hydrogen storage cylinder group 41.

[0062] Example 2

[0063] This embodiment provides an operation control method for a liquid hydrogen refueling station based on the liquid hydrogen pressurization and vaporization type described in Embodiment 1. When the liquid hydrogen refueling station needs to refuel a 70MPa fuel cell vehicle, and the 45MPa first hydrogen storage cylinder group 41 and second hydrogen storage cylinder group 42, the 90MPa third hydrogen storage cylinder group 43 and fourth hydrogen storage cylinder group 44 are all full, the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 do not work, and refueling is completed solely by the high-pressure hydrogen storage cylinder group 4 within the station. The 45MPa first hydrogen storage cylinder group 41 and the 90MPa third hydrogen storage cylinder group 43 within the high-pressure hydrogen storage cylinder group 4 sequentially output room temperature hydrogen. When the station's monitoring system detects that the pressure inside the 45MPa first hydrogen storage cylinder group 41 is the same as the pressure inside the 70MPa fuel cell vehicle, the second hydrogen control valve 412 is closed, and the sixth hydrogen control valve 432 is opened simultaneously, switching the refueling process to the 90MPa third hydrogen storage cylinder group 43. During the refueling process, the high-pressure hydrogen is kept at a constant temperature of -40°C by the heat exchange system of the second hydrogen refueling machine 62 before being injected into the 70MPa fuel cell vehicle.

[0064] Assuming a room temperature of 20°C, and the required residual gas pressure of the 70MPa fuel cell vehicle to be refueled is 15MPa, according to the relevant SAE-J2601 refueling protocol, the average pressure rise rate under this condition should be 28.2MPa / min. The refueling time t is:

[0065]

[0066] According to the above formula, when the first hydrogen storage cylinder group 41 and the second hydrogen storage cylinder group 42 of 45MPa in the high-pressure hydrogen storage cylinder group 4 in the station are both full, it takes 1.95 minutes to refuel a 35MPa fuel cell vehicle with an initial pressure of 5MPa. The refueling process only consumes the high-pressure hydrogen in the first hydrogen storage cylinder group 41 of 45MPa and the third hydrogen storage cylinder group 43 of 90MPa.

[0067] Example 3

[0068] This embodiment provides an operation control method for a liquid hydrogen refueling station based on the liquid hydrogen pressurization and vaporization type in Embodiment 1. When the liquid hydrogen refueling station needs to refuel a 35MPa fuel cell vehicle, and the pressure of the first 45MPa hydrogen storage cylinder group 41 in the high-pressure hydrogen storage cylinder group 4 of the station is lower than that of the second 45MPa hydrogen storage cylinder group 42, the refueling process is as follows:

[0069] S1: First, start the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22, and open the first liquid hydrogen control valve 211 and the third liquid hydrogen control valve 221. Close the second liquid hydrogen control valve 212 and the fourth liquid hydrogen control valve 222. Open the first gaseous hydrogen control valve 411, and close the second gaseous hydrogen control valve 412, the third gaseous hydrogen control valve 421, the fourth gaseous hydrogen control valve 422, the fifth gaseous hydrogen control valve 431, the sixth gaseous hydrogen control valve 432, the seventh gaseous hydrogen control valve 441, and the eighth gaseous hydrogen control valve 442. The two liquid hydrogen booster pumps simultaneously fill the 45MPa first hydrogen storage cylinder group 41 with gas through the vaporizer 3. Due to the back pressure characteristics of the liquid hydrogen booster pumps, the output pressure can be rapidly increased.

[0070] S2: When the output pressure of the two liquid hydrogen booster pumps is consistent with the hydrogen pressure in the 45MPa first hydrogen storage tank group 41, the first liquid hydrogen control valve 211 is closed, the second liquid hydrogen control valve 212 is opened, the first gaseous hydrogen control valve 411 is closed, and the second gaseous hydrogen control valve 412 and the third gaseous hydrogen control valve 421 are opened. The second liquid hydrogen booster pump 22 fills the 45MPa second hydrogen storage tank group 42 with gas. The liquid hydrogen output by the first liquid hydrogen booster pump 21 and the gaseous hydrogen output by the 45MPa first hydrogen storage tank group 41 are mixed in the mixing and temperature matching tank 5 and then filled into the fuel cell vehicle through the first hydrogen refueling machine 61.

[0071] S3: When the gaseous hydrogen flow rate output from the 45MPa first hydrogen storage cylinder group 41 in S2 is less than the set value of 0.5kg / min, the third liquid hydrogen control valve 221 and the second liquid hydrogen control valve 212 are closed, the first liquid hydrogen control valve 211 and the fourth liquid hydrogen control valve 222 are opened, the second gaseous hydrogen control valve 412 and the third gaseous hydrogen control valve 421 are closed, and the first gaseous hydrogen control valve 411 and the fourth gaseous hydrogen control valve 422 are opened. The first liquid hydrogen booster pump 21 fills the 45MPa first hydrogen storage cylinder group 41 with gas. The liquid hydrogen output from the second liquid hydrogen booster pump 22 and the gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group 42 are mixed in the mixing and temperature matching tank 5 and then filled into the fuel cell vehicle through the first hydrogen refueling machine 61.

[0072] S4: When the gaseous hydrogen flow rate output from the second hydrogen storage cylinder group 42 at 45MPa in S3 is less than the set value of 0.5kg / min, the fourth liquid hydrogen control valve 222 is closed, the third liquid hydrogen control valve 221 is opened, and the first gaseous hydrogen control valve 411 is closed. The liquid hydrogen output from the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 is vaporized by the first liquid hydrogen vaporizer 31 and the second liquid hydrogen vaporizer 32, and then flows with the gaseous hydrogen output from the second hydrogen storage cylinder group 42 at 45MPa through the mixing and temperature matching tank 5, and is charged into the fuel cell vehicle through the first hydrogen refueling machine 61 until the pressure of the fuel cell vehicle reaches 35MPa and then stops.

[0073] Example 4

[0074] This embodiment provides an operation control method for a liquid hydrogen refueling station based on the liquid hydrogen pressurization and vaporization type in Embodiment 1. When the liquid hydrogen refueling station needs to refuel a 70MPa fuel cell vehicle, and both the 45MPa and 90MPa high-pressure hydrogen storage cylinder groups in the station are not full, the refueling process is as follows:

[0075] S1: First, start the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22. Open the first liquid hydrogen control valve 211 and the third liquid hydrogen control valve 221, and close the second liquid hydrogen control valve 212 and the fourth liquid hydrogen control valve 222. Open the first gaseous hydrogen control valve 411, and close the second gaseous hydrogen control valve 412, the third gaseous hydrogen control valve 421, the fourth gaseous hydrogen control valve 422, the fifth gaseous hydrogen control valve 431, the sixth gaseous hydrogen control valve 432, the seventh gaseous hydrogen control valve 441, and the eighth gaseous hydrogen control valve 442. The two liquid hydrogen booster pumps simultaneously fill the first 45MPa hydrogen storage cylinder group 41, which has a lower pressure, through the vaporizer. Due to the back pressure characteristics of the liquid hydrogen booster pumps, the output pressure can be rapidly increased.

[0076] S2: When the output pressure of the liquid hydrogen booster pump is consistent with the hydrogen pressure in the 45MPa first hydrogen storage tank group 41, the first liquid hydrogen control valve 211 is closed, the second liquid hydrogen control valve 212 is opened, the first gaseous hydrogen control valve 411 is closed, and the second gaseous hydrogen control valve 412 and the third gaseous hydrogen control valve 421 are opened. The liquid hydrogen output by the first liquid hydrogen booster pump 21 and the gaseous hydrogen output by the 45MPa first hydrogen storage tank group 41 are mixed in the mixing and temperature matching tank 5, and then charged into the fuel cell vehicle through the second hydrogen refueling machine 62. The second liquid hydrogen booster pump 22 charges the 45MPa second hydrogen storage tank group 42, which has a higher pressure in the 45MPa hydrogen storage tank group.

[0077] S3: When the gaseous hydrogen flow rate output from the 45MPa first hydrogen storage cylinder group 41 in S2 is less than the set value of 0.5kg / min, the third liquid hydrogen control valve 221 and the second liquid hydrogen control valve 212 are closed, the first liquid hydrogen control valve 211 and the fourth liquid hydrogen control valve 222 are opened, the second gaseous hydrogen control valve 412 and the third gaseous hydrogen control valve 421 are closed, and the fifth gaseous hydrogen control valve 431 and the fourth gaseous hydrogen control valve 422 are opened. The first liquid hydrogen booster pump 21 fills the 90MPa third hydrogen storage cylinder group 43 with lower pressure in the 90MPa hydrogen storage cylinder. The liquid hydrogen output from the second liquid hydrogen booster pump 22 and the gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group 42 are mixed in the mixing and temperature matching tank 5 and then filled into the fuel cell vehicle through the second hydrogen refueling machine 62.

[0078] S4: When the gaseous hydrogen output from the second hydrogen storage tank group 42 (45MPa) in S3 is less than 0.5kg / min, the first liquid hydrogen control valve 211 and the fourth liquid hydrogen control valve 222 are closed, the third liquid hydrogen control valve 221 and the second liquid hydrogen control valve 212 are opened, the fifth gaseous hydrogen control valve 431 is closed, the sixth gaseous hydrogen control valve 432 and the seventh gaseous hydrogen control valve 441 are opened, the liquid hydrogen output from the first liquid hydrogen booster pump 21 and the gaseous hydrogen output from the third hydrogen storage tank group 43 (90MPa) are mixed in the mixing and temperature matching tank 5, and then charged into the fuel cell vehicle through the second hydrogen refueling machine 62. The second liquid hydrogen booster pump 22 charges the fourth hydrogen storage tank group 44 (90MPa).

[0079] S5: When the gaseous hydrogen flow rate output from the 90MPa third hydrogen storage tank group 43 in S3 is less than 0.3kg / min, the first liquid hydrogen control valve 211 and the fourth liquid hydrogen control valve 222 are opened, the third liquid hydrogen control valve 221 and the second liquid hydrogen control valve 212 are closed, the fifth gaseous hydrogen control valve 431 and the eighth gaseous hydrogen control valve 442 are opened, the sixth gaseous hydrogen control valve 432 and the seventh gaseous hydrogen control valve 441 are closed, the first liquid hydrogen booster pump 21 fills the 90MPa third hydrogen storage tank group 43 with gas, and the liquid hydrogen output from the second liquid hydrogen booster pump 22 and the gaseous hydrogen output from the 90MPa fourth hydrogen storage tank group 44 are mixed in the mixing and temperature matching tank 5 and then filled into the fuel cell vehicle through the second hydrogen refueling machine 62.

[0080] S6: When the gaseous hydrogen flow rate output from the 90MPa fourth hydrogen storage cylinder group 44 in S5 is less than the set value of 0.3kg / min, the fourth liquid hydrogen control valve 222 is closed, the third liquid hydrogen control valve 221 is opened, and the fifth gaseous hydrogen control valve 431 is closed. The liquid hydrogen output from the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 is vaporized by the first liquid hydrogen vaporizer 31 and the second liquid hydrogen vaporizer 32, and then flows with the gaseous hydrogen output from the 90MPa fourth hydrogen storage cylinder group 44 through the mixing and temperature matching tank 5, and is charged into the fuel cell vehicle through the second hydrogen refueling machine 62 until the pressure of the fuel cell vehicle reaches 70MPa and then stops.

[0081] Example 5

[0082] This embodiment provides an operation control method for a liquid hydrogen refueling station based on the liquid hydrogen pressurization and vaporization type described in Embodiment 1. When the liquid hydrogen refueling station does not need to refuel fuel cell vehicles, if any high-pressure hydrogen storage cylinder group 4 has not reached its rated pressure, the first liquid hydrogen control valve 211 and the third liquid hydrogen control valve 221 are opened, and the second liquid hydrogen control valve 212 and the fourth liquid hydrogen control valve 222 are closed. The first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 then fill the high-pressure hydrogen storage cylinder group 4 with gas. The filling is performed sequentially according to the pressure level from high to low, and each high-pressure hydrogen storage cylinder group is filled before the next high-pressure hydrogen storage cylinder group is filled.

[0083] a. A hydrogen storage cylinder group with higher pressure inside a 90MPa hydrogen storage cylinder group;

[0084] b. A hydrogen storage cylinder group with lower pressure inside a 90MPa hydrogen storage cylinder group;

[0085] c. Hydrogen storage cylinder group with higher pressure within the 45MPa hydrogen storage cylinder group;

[0086] d. A hydrogen storage cylinder group with lower pressure within a 45MPa hydrogen storage cylinder group;

[0087] The order of replenishment is determined by two factors: the pressure rating of the hydrogen storage cylinder group and the residual gas pressure. In the replenishment decision, the rated pressure rating of the high-pressure hydrogen storage cylinder group 4 takes precedence over the residual gas pressure. Once all high-pressure hydrogen storage cylinder groups have reached their rated pressure, the first liquid hydrogen booster pump 21 and the second liquid hydrogen booster pump 22 cease operation.

[0088] Assume the pressure of the first hydrogen storage cylinder group 41 (45MPa) is 40MPa, the pressure of the second hydrogen storage cylinder group 42 (45MPa) is 36MPa, the pressure of the third hydrogen storage cylinder group 43 (90MPa) is 70MPa, and the pressure of the fourth hydrogen storage cylinder group 44 (90MPa) is 82MPa. According to the gas replenishment priority, the replenishment should be carried out in the following order: fourth hydrogen storage cylinder group 44 (90MPa), third hydrogen storage cylinder group 43 (90MPa), first hydrogen storage cylinder group 41 (45MPa), and second hydrogen storage cylinder group 42 (45MPa). Two liquid hydrogen booster pumps output high-pressure liquid hydrogen at a flow rate of 1 kg / min, which flows into vaporizer 3 and vaporizes to room temperature to replenish the high-pressure hydrogen storage cylinder group 4 in the station. Assume the room temperature is 20℃, and the total volume of the first hydrogen storage cylinder group 41 and the second hydrogen storage cylinder group 42 (45MPa) is 16 m³. 3 The third hydrogen storage cylinder group 43 and the fourth hydrogen storage cylinder group 44 are 1m³ and 90MPa, respectively. 3 The densities at various pressures under 20°C were obtained by querying the NIST database, as shown in Table 1.

[0089] Table 1. Densities at various pressures at 20℃

[0090]

[0091] The time required to fill each hydrogen storage cylinder group in high-pressure hydrogen storage cylinder group 4 according to the order of filling is as follows:

[0092] The time required to refill the fourth hydrogen storage cylinder group 44 (90MPa) is:

[0093]

[0094] The time required to refill the 90MPa third hydrogen storage cylinder group 43 is:

[0095]

[0096] The time required to refill the first hydrogen storage cylinder group 41 (45MPa) is:

[0097]

[0098] The time required to refill the second hydrogen storage tank group 42 (45MPa) is:

[0099]

[0100] Therefore, under the above circumstances, the total time required to refill all cylinders in high-pressure hydrogen storage cylinder group 4 is:

[0101] 1.35+3.55+20.16+37.12=62.18min

[0102] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for operating and controlling a liquid hydrogen refueling station using a pressurized vaporization type, characterized in that, A liquid hydrogen refueling station includes a liquid hydrogen source (1), a liquid hydrogen booster pump group (2), a liquid hydrogen vaporizer group (3), a high-pressure hydrogen storage cylinder group (4), a blending and temperature mixing tank (5), a hydrogen refueling unit (6), and a central processing unit; The outlet pipe of the liquid hydrogen source (1) is connected to the liquid hydrogen booster pump set (2), and the outlet pipe of the liquid hydrogen booster pump set (2) is connected to the mixing and temperature adjustment tank (5). Alternatively, the outlet pipe of the liquid hydrogen booster pump group (2) is connected to the liquid hydrogen vaporizer group (3); The outlet pipe of the liquid hydrogen vaporizer group (3) is connected to the high-pressure hydrogen storage cylinder group (4), the outlet pipe of the high-pressure hydrogen storage cylinder group (4) is connected to the mixing and temperature mixing tank (5), and the outlet pipe of the mixing and temperature mixing tank (5) is connected to the hydrogen refueling unit (6). The liquid hydrogen booster pump unit is communicatively connected to the central processing unit, which is used for the operation control of the liquid hydrogen booster gasification type liquid hydrogen refueling station. Operation control methods include: First hydrogen refueling mode: When the 45MPa high-pressure hydrogen storage tank group can complete the entire hydrogen refueling process for the 35MPa fuel cell vehicle, the 45MPa high-pressure hydrogen storage tank group is used to refuel the 35MPa fuel cell vehicle. Second hydrogen refueling mode: When the 45MPa high-pressure hydrogen storage tank group and the 90MPa high-pressure hydrogen storage tank group can complete the entire hydrogen refueling process for the 70MPa fuel cell vehicle, the 45MPa and 90MPa high-pressure hydrogen storage tank groups are used to refuel the 70MPa fuel cell vehicle. The third hydrogen refueling mode: When a liquid hydrogen refueling station refuels a 35MPa fuel cell vehicle, and the station's 45MPa high-pressure hydrogen storage tank alone cannot complete the entire refueling process, the refueling process includes the following steps: S1: Start the liquid hydrogen booster pump group (2), adjust the liquid hydrogen control valve and the gas hydrogen control valve so that the two liquid hydrogen booster pumps simultaneously fill the first 45MPa hydrogen storage cylinder group (41) with lower pressure through the liquid hydrogen vaporizer group (3); S2: When the output pressure of the liquid hydrogen booster pump group is consistent with the hydrogen pressure in the 45MPa hydrogen storage cylinder in S1, adjust the liquid hydrogen control valve and the gas hydrogen control valve so that the liquid hydrogen output by the first liquid hydrogen booster pump (21) and the gas hydrogen output by the 45MPa first hydrogen storage cylinder group (41) are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6); S3: When the gaseous hydrogen output from the 45MPa first hydrogen storage cylinder group (41) in S2 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump (22) and the gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group (42) are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6). S4: When the flow rate of gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group (42) in S3 is less than the set value of 0~0.5kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the liquid hydrogen booster pump group (2) is vaporized by the liquid hydrogen vaporizer group (3) and flows with the gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group (42) through the mixing and temperature matching tank (5), and is charged into the fuel cell vehicle through the hydrogen refueling unit (6) until the pressure of the fuel cell vehicle reaches 35MPa and then stops. Fourth hydrogen refueling mode: When the 45MPa and 90MPa high-pressure hydrogen storage cylinder groups cannot complete the entire hydrogen refueling process for the 70MPa fuel cell vehicle, the gaseous hydrogen output from the 45MPa and 90MPa high-pressure hydrogen storage cylinder groups is mixed with the liquid hydrogen output from the liquid hydrogen booster pump group (2) in sequence to refuel the 70MPa fuel cell vehicle. Hydrogen replenishment mode: When the liquid hydrogen refueling station does not need to refuel the fuel cell vehicle, there are high-pressure hydrogen storage cylinders in the high-pressure hydrogen storage cylinder group (4) that have not reached the rated pressure. The liquid hydrogen booster pump group (2) is used to fill the high-pressure hydrogen storage cylinder group (4) with gas to replenish hydrogen.

2. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The liquid hydrogen booster pump assembly (2) includes at least two liquid hydrogen booster pumps connected in parallel. The high-pressure hydrogen storage cylinder group (4) includes multiple hydrogen storage cylinder groups arranged in parallel and having different pressure levels or a single pressure hydrogen storage cylinder group.

3. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 2, characterized in that, The outlet pipe of the liquid hydrogen booster pump is equipped with a safety relief valve, a temperature sensor, a pressure sensor, and a flow meter. The safety relief valve, temperature sensor, pressure sensor, and flow meter are all connected to the central processing unit.

4. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The high-pressure hydrogen storage cylinder group (4) is equipped with an inlet hydrogen control valve on its inlet pipe and an outlet hydrogen control valve on its outlet pipe. Both the inlet and outlet hydrogen control valves are connected to the central processing unit.

5. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The specific process of the first hydrogenation mode is as follows: When a liquid hydrogen refueling station refuels a 35MPa fuel cell vehicle, and the entire refueling process can be completed solely by the 45MPa high-pressure hydrogen storage cylinder group (4) within the station, the liquid hydrogen booster pump group (2) does not work. The 45MPa hydrogen storage cylinder group (4) outputs room temperature hydrogen gas, which is then constant to the specified temperature through the heat exchange system of the hydrogen refueling unit (6) before being filled into the 35MPa fuel cell vehicle.

6. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The specific process of the second hydrogenation mode is as follows: When a liquid hydrogen refueling station refuels a 70MPa fuel cell vehicle, and the entire refueling process can be completed solely by the 45MPa and 90MPa high-pressure hydrogen storage cylinder groups within the station, the liquid hydrogen booster pump group (2) does not operate. The 45MPa and 90MPa hydrogen storage cylinder groups within the high-pressure hydrogen storage cylinder group (4) sequentially output room-temperature hydrogen, which is then constant to the specified temperature through the heat exchange system of the hydrogen refueling unit (6) before being filled into the 70MPa fuel cell vehicle.

7. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The specific process of the fourth hydrogenation mode is as follows: Fourth hydrogen refueling mode: When a liquid hydrogen refueling station refuels a 70MPa fuel cell vehicle, and the station's 45MPa and 90MPa high-pressure hydrogen storage tanks alone cannot complete the entire refueling process, the refueling process includes the following steps: S1: Start the liquid hydrogen booster pump group (2), adjust the liquid hydrogen control valve and the gas hydrogen control valve, and the two liquid hydrogen booster pumps simultaneously fill the first 45MPa hydrogen storage cylinder group (41) with lower pressure through the liquid hydrogen vaporizer group (3). S2: When the output pressure of the liquid hydrogen booster pump group (2) is consistent with the hydrogen pressure in the 45MPa first hydrogen storage cylinder group (41) in S1, adjust the liquid hydrogen control valve and the gas hydrogen control valve so that the liquid hydrogen output by the first liquid hydrogen booster pump (21) and the gas hydrogen output by the 45MPa first hydrogen storage cylinder group (41) are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6); S3: When the gaseous hydrogen output from the first hydrogen storage cylinder group (41) of 45MPa in S2 is less than the set value of 0.3 ~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump (22) and the gaseous hydrogen output from the second hydrogen storage cylinder group (42) of 45MPa are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6). S4: When the flow rate of gaseous hydrogen output from the 45MPa second hydrogen storage cylinder group (42) in S3 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the first liquid hydrogen booster pump (21) and the gaseous hydrogen output from the 90MPa third hydrogen storage cylinder group (43) are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6). S5: When the gaseous hydrogen output from the 90MPa third hydrogen storage cylinder group (43) in S4 is less than the set value of 0.3~1kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the second liquid hydrogen booster pump (22) and the gaseous hydrogen output from the 90MPa fourth hydrogen storage cylinder group (44) are mixed in the mixing and temperature matching tank (5) and then charged into the fuel cell vehicle through the hydrogen refueling unit (6). S6: When the gaseous hydrogen output from the 90MPa fourth hydrogen storage cylinder group (44) in S5 is less than the set value of 0~0.5kg / min, adjust the liquid hydrogen control valve and the gaseous hydrogen control valve. The liquid hydrogen output from the liquid hydrogen booster pump group (2) is vaporized by the liquid hydrogen vaporizer group (3) and flows with the gaseous hydrogen output from the 90MPa fourth hydrogen storage cylinder group (44) through the mixing and temperature matching tank (5), and is charged into the fuel cell vehicle through the hydrogen refueling unit (6) until the pressure of the fuel cell vehicle reaches 70MPa and then stops.

8. The operation control method for a liquid hydrogen pressurization and vaporization type liquid hydrogen refueling station according to claim 1, characterized in that, The specific process of the hydrogen replenishment mode is as follows: When the liquid hydrogen refueling station does not need to refuel the fuel cell vehicle, there are high-pressure hydrogen storage cylinders in the high-pressure hydrogen storage cylinder group (4) that have not reached the rated pressure. Adjust the liquid hydrogen control valve so that the liquid hydrogen booster pump group (2) fills the high-pressure hydrogen storage cylinder group (4) with gas in the order of pressure level from high to low, and fill each high-pressure hydrogen storage cylinder group in the order of filling the next high-pressure hydrogen storage cylinder group. When all high-pressure hydrogen storage cylinder groups have reached the rated pressure, the liquid hydrogen booster pump group (2) stops working.

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